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20111222112 = 253209491897
BaseRepresentation
bin10010101110101110…
…001110010101100000
31220220120210221022020
4102232232032111200
5312141433101422
613123341141440
71311242365422
oct225656162540
956816727266
1020111222112
118590295923
123a9325a880
131b8674a337
14d8ad98812
157ca8da95c
hex4aeb8e560

20111222112 has 24 divisors (see below), whose sum is σ = 52791958296. Its totient is φ = 6703740672.

The previous prime is 20111222107. The next prime is 20111222119. The reversal of 20111222112 is 21122211102.

Adding to 20111222112 its reverse (21122211102), we get a palindrome (41233433214).

It is a tau number, because it is divible by the number of its divisors (24).

It is a super-2 number, since 2×201112221122 (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20111222091 and 20111222100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20111222119) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 104745853 + ... + 104746044.

It is an arithmetic number, because the mean of its divisors is an integer number (2199664929).

Almost surely, 220111222112 is an apocalyptic number.

It is an amenable number.

20111222112 is an abundant number, since it is smaller than the sum of its proper divisors (32680736184).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20111222112 is a wasteful number, since it uses less digits than its factorization.

20111222112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 209491910 (or 209491902 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 15.

The spelling of 20111222112 in words is "twenty billion, one hundred eleven million, two hundred twenty-two thousand, one hundred twelve".

Divisors: 1 2 3 4 6 8 12 16 24 32 48 96 209491897 418983794 628475691 837967588 1256951382 1675935176 2513902764 3351870352 5027805528 6703740704 10055611056 20111222112